Turbine



Patented Aug. 25, 1925.

UNITED STATES PATENT OFFICE.

HENRY F. SCHMIDT, OF SWARTHMOBE, PENNSYLVANIA, ASSIGNOR TO WESTING- HOUSE ELECTRIG AND MANUFACTURING COMPANY, A CORPORATION 01? PENN- SYLVANIA.

TURBINE.

Application filed October 6, 1922. Serial No. 592,863.

To all'whom 2'25 may concern:

Be it known that I, HENRY F. SCHMIDT, a citizen of the United States, and a resident of Swarthmo-re, in the county of Delaware and State of Pennsylvania, have invented a new and useful Improvement in Turbines, of which the following is a specification.

My invention relates to elastic-fluid turbines, more particularly to the opposed-flow section type, such as marine turbines, having common exhaust chambers, and it has for its object to provide mechanism in the exhaust chamber which shall effectively close communication between the exhaust chamber and an idle section to prevent the flow of motive fluid into the latter from the exhaust chamber and the active section and the consequent churning of such motive fluid by' the idly-running section, resulting in excessive loss of power in the latter.

Apparatus made in accordance with my invention is illustrated in the accompanying drawings, forming a part of this application, in which Fig. l is a longitudinal sectional view of an opposed-flow type of turbine showing my improvement applied thereto; and Fig. 2 is a detail sectional View of a modified form of my invention.

In Fig. 1, I show an opposed-flow type of turbine having an ahead section, at 10, and a reversing section, at 11. The ahead and reversing sections, at 10 and 11, are provided with any suitable type of energy abstracting elements or blading carried by the rotor 12 and by the cylinder or casing 13. The ahead and reversing sections discharge intoa common exhaust chamber 14, provided by the cylinder or casing 13, which communicates with any suitable exhaust outlet 15.

A closure member 16 is arranged between the ahead section, at 10, and the reversing section, at 11, for the purpose of closing communication between the exhaust chamber 14; and an idly-running turbine section. The closure member is moved, for this purpose, by the impact of motive fluid discharge from an active section.

In Fig. 1, the rotor 12 is provided with a longitudinally-extending guide portion 17 for the closure member 16; and the closure member, for the purpose of lightness, is made in the form of a channel in cross-section having a hub portion 18, which fits the guide portion 17, and side plates 19, which act as closure portions for the sections when running idly as well as piston members to receive the impact of motive fluid discharged from the sections when running actively.

In Fig. 2, I show apparatus which is similar in principle to that shown in Fig. 1, the only difference being that the guide is carried by the cylinder or casing and that the construction of the closure member 20 is reversed. In this view, I show a guide member 21, carried by the interior of the exhaust chamber 22 for the closure member 20.

From the foregoing, it will be apparent that I have provided, in connection with an opposed-flow type of turbine, means for effectively preventing the entrance of steam from the exhaust chamber into an idly-running section where it would be churned up by the blading and result in overheating thereof.

lVhile I have shown my invention in but two forms, it will be obvious to those skilled in the art that it is not so limited, but is susceptible of various other changes and modifications without departing from the spirit thereof, and I desire, therefore, that only such limitations shall be placed thereupon as are imposed by the prior art or as are specifically set forth in the appended claims.

What I claim is:

1. A turbine comprising a casing, a rotor, opposed-flow sections having a common exhaust chamber, and a movable member surrounding the rotor in the chamber and actuated by motive fluid discharged from either section to cover an idly-running sectio-n.

2. A turbine comprising a casing, a rotor, opposed-flow sections having a common exhaust chamber and a closure member surrounding the rotor and actuated by impact of motive fluid discharged from either sec tion to effectively close communication between the exhaust chamber and an idlyrunning section.

3. The combination, with a turbine having a casing and a rotor, forward and reversing sections and a common exhaust chamber, of a member surrounding the rotor in the exhaust chamber and movable by impact of motive fluid discharged from an active section to substantially close communication between the exhaust chamber and an idlyrunning section.

4:. A turbine comprising a casing, a rotor, forward and reversing sections, an exhaust chamber between the sections, a 1ongitudinally-extending guide between the sections, and a closure member surrounding the rotor which is movable on said guide in response to impact of motive fluid discharged from an active section to effectively close communication between the exhaust chamber and an idly-running section.

5. A turbine comprising forward and reversing sections, an exhaust chamber between the sections, a guide on the rotor between the sections, and a closure member which is movable on the guide in response to impact of motive fluid discharged from an active section to effectively close communication between the exhaust chamber and an idly-running section 6. A turbine comprising forward and reversing sections, an exhaust chamber between the sections, a longitudinally-extending guide between the sections, and a closure member which is channel-shaped in cross-section and which is movable on said guide in response to impact of motive fluid from an active section to effectively close communication between the exhaust chamber and an idlyrunning section.

In testimony whereof, I have hereunto subscribed my name this 29th day of September 1922.

HENRY F. SCHMIDT. 

